I have never been able to understand why people have pets, cats and dogs, for example; not really.
In her autobiography TO A DIFFERENT DRUM the missionary Dr. Pauline G. Hamilton is writing about her dog.
The dog made her aware that there was a fire near her house by behaving strangely, where she lived at one stage of her life. Cinderella, the dog, kept her also from going to pick strawberries one morning. There was a poisonous snake in the patch. Once she was attacked and her Cindy bit the attacker in the leg and saved her.
But I understand now a little bit better why people have dogs.